
var slideIndex = 0;
showSlides();
 
function showSlides() {
    var i;
    var slides = document.getElementsByClassName("mySlides");
   
    for (i = 0; i < slides.length; i++) {
       slides[i].style.display = "none";  
    }
    slideIndex++;
    if (slideIndex > slides.length) {slideIndex = 1}    
   
    slides[slideIndex-1].style.display = "block";  
    
    setTimeout(showSlides, 2000); // 切换时间为 2 秒
}
